Configuring a Simple Firewall - Cisco

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CHAPTERBETA DRAFT - Cisco CONFIDENTIAL8-1Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration GuideOL-6426-028Configuring a Simple FirewallThe Cisco 1800 integrated services routers support network traffic filtering by means of access lists. The router also supports packet inspection and dynamic temporary access lists by means of Context-Based Access Control (CBAC).Basic traffic filtering is limited to configured access list implementations that examine packets at the network layer or, at most, the transport layer, permitting or denying the passage of each packet through the Firewall . However, the use of inspection rules in CBAC allows the creation and use of dynamic temporary access lists.

and the local networks through the configured VPN tunnel. Command or Action Purpose Step 1 ip inspect name inspection-name protocol Example: Router(config)# ip inspect name firewall tcp Router(config)# Defines an inspection rule for a particular protocol. Step 2 ip inspect name inspection-name protocol Example: Router(config)# ip inspect name ...

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